Add 21/42 and 20/35
21/42 + 20/35 is 15/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
21/42 = 21 × 5/42 × 5 = 105/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
20/35 = 20 × 6/35 × 6 = 120/210 - Add the two like fractions:
105/210 + 120/210 = 105 + 120/210 = 225/210 - 225/210 simplified gives 15/14
- So, 21/42 + 20/35 = 15/14
In mixed form: 11/14
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